No internet access apart from in family areas, the agreement that you hold all passwords and can check on any accounts for anything any time you choose ( and do so, not just an empty threat) and a discussion about what can and does go wrong when using social media.

I too think you are being unfair and making life difficult for him, socially.Teens these days do everything via their phones, you will be isolating him if he isn't allowed to do anything. I also suspect he'll just set up accounts via friends gadgets.It's our job as parents to teach our dc how to be safe in this world, not ban them from anything that will harm them - in the same way you've no doubt taught him how to cross roads rather than saying he has to stay in the house all his life.

His current phone will be fine to text his friends. He can moan by text that his parents will only let him have an old fashioned Brick Phone and so no, they can't share that funny YouTube video with him